What does a negative rubella titer mean?
A positive test is 1.0 or higher. That means you have rubella antibodies in your blood and are immune to future infection. A negative test is 0.7 or lower. You have too few antibodies to make you immune.
What happens if rubella IgG is negative?
Negative: This means you are not immune to rubella. If you are a woman thinking about getting pregnant, talk with your doctor about getting a rubella vaccine before pregnancy. A test for rubella IgM antibodies is done only if the doctor suspects that you have a current rubella infection.
Is a negative rubella test good?
A positive rubella IgG test result is good—it means that you are immune to rubella and cannot get the infection. This is the most common rubella test done. Negative: This means you are not immune to rubella.
What is a normal rubella titer?
Reference Range: 7 IU/mL or less: Negative – No significant level of detectable rubella IgG antibody. 8-9 IU/mL: Equivocal – Repeat testing in 10-14 days may be helpful. 10 IU/mL or greater: Positive – IgG antibody to rubella detected, which may indicate a current or previous exposure/immunization to rubella.
What level is rubella immune?
The Rubella Subcommittee of the National Committee for Clinical Laboratory Standards has proposed lowering the breakpoint to define rubella immunity from 15 to 10 IU/mL. This recommendation stems from epidemiologic studies on vaccinated persons with low levels of antibody and anecdotal reports.
What is rubella in pregnancy?
Rubella is a contagious viral infection best known by its distinctive red rash. It’s also called German measles or three-day measles. While this infection may cause mild symptoms or even no symptoms in most people, it can cause serious problems for unborn babies whose mothers become infected during pregnancy.
Is rubella vaccine necessary before pregnancy?
As the rubella virus is so virulent early in pregnancy, the vaccine, which is composed of weakened live virus, is not advised during that time. In addition, women who receive the vaccine are cautioned to avoid conceiving for three months.